I have the same problem,the below code is the detail: JbpmConfiguration config=JbpmConfiguration.getInstance(); JbpmContext jbpmContext=config.createJbpmContext(); //Session session=jbpmContext.getSessionFactory().openSession(); //Transaction trans=session.beginTransaction(); ProcessDefinition pd=jbpmContext.getGraphSession().findLatestProcessDefinition("baoxiao"); //ProcessInstance pi=pd.createProcessInstance(); ProcessInstance pi= new ProcessInstance(pd); pi.getContextInstance().setVariable(Constants.ISSUE_USER, Constants.userName); TaskInstance ti=pi.getTaskMgmtInstance().createStartTaskInstance(); ti.setVariable("baoxiaoId", 6);//baoxiao.getBaoxiaoId()); ti.end(); the log is follow: 2008-06-01 17:26:43,906 [org.hibernate.engine.StatefulPersistenceContext.ProxyWarnLog] [WARN] Narrowing proxy to class org.jbpm.graph.node.StartState - this operation breaks == 2008-06-01 17:26:47,421 [org.hibernate.engine.StatefulPersistenceContext.ProxyWarnLog] [WARN] Narrowing proxy to class org.jbpm.graph.node.TaskNode - this operation breaks == View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4154894#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...